Stop mechanism for roving-machines and the like.



TIEENT IIEV. STOP MECHANISM FOR novme MACHINES AND THE LIKE.

APPLICATION FILED Auemz. 1913;

Patented Nov. 21 1916.

Witnesses.

Inventor. Thomas Bentley, 'YMMW A I I 'S.

THOMAS BENTLEY, OF DRACUT CENTER, MASSACHUSETTS, ASSIGrNOR OF ONE-HALF TO GEORGE M. HARRIG'A-N,

0F LOWELL, MASSACHUSETTS.

STOP MECHANISM FOR ROVING-MACI-IINES AND THE LIKE.

Specification of Letters Patent.

Patented Nov. 21, 1916.

Application filed August 18, 1913. Serial No. 785,216.

To all whom it may concern:

Be it known that I, THOMAS BENTLEY, citizen of the United States, residing at Dracut Center, county of Middlesex, State of Massachusetts, have invented an Improvement in Stop Mechanism for Roving-Machines and the like, of which the following description, in connection with the accompanying drawing, is a specification, l ke characters on the drawing representmg l1ke parts.

This invention relates to stop mechanisms for roving frames and the like, and has for an object the production of an lmproved means for automatically stopping the drawing rolls to prevent singles, in apparatus for doubling threads, yarns and slivers.

In stop mechanisms of this type, a series of detectors havlng a limited vertical movement are normally held in elevated position by slivers, roving or yarn passing through said detectors, before entering the drawing rolls. An oscillator or feeler is mounted just beneath the detectors and is normally oscillated through a yieldable connector-from a constantly rotating shaft of the drawing rolls. Upon the breaking of a sliver a detector falls into the path of the feeler and stops it. A belt shifter is arranged adjacent the yieldable connector, and is adapted to be operated to shift the belt to the loose pulley when the feeler is stopped by a fallen detector. These mechanisms have not been entirely reliable, because the broken slivers some times wedge between the detector and its support, so that the detector fails to fall, and because a considerable jar is caused when the feeler engages a fallen detector, straining the parts, and causing a jarring of the machine;

In accordance with my PIGSGIliS'lIlVOIllZIOIl I provide a detector supported between guides which can be adjusted for dlfierent sizes of slivers to avoid such wedging, and provide an improved connector which readily yields to operate the belt shifter wlthout causing appreciable strain on any of the parts.

In the drawing, in which I have illustrated a selected embodiment of my invention, Figure 1 is an end view of a roving frame showing my invention applled thereto. Fig. 2 is a view taken on the line 2-2,.

Fig. 1. Fig. 3 is proved connector.

a plan view of my im- Fig. 4. is a side view of the same; Fig. 5 is a sectional view of the detector guide showing a'detector in position. Fig. '6 is a view 'of the detector'removed from its guides. Figs. 7 and 8 are views similar to Figs, 5 and 6 showing another form of detector.

Referring to the drawings in detail 1 indicates the drawing roll stand, 2 the drawing rolls, and 3 one of the constantly rotating shafts of the drawing mechanism.

4 indicates the detectors, each of which is held in elevated position by a sliver 5 passing therethrough. v

6 indicates an oscillator or feeler mounted upon the rock shaft 7 and arranged to reciprocate just beneath the detectors, and to be intercepted whenever a detector falls, due to the breaking of a sliver.

Upon the constantly rotating shaft 3 is secured a crank 8. .Uponthe shaft '7 is secured an arm 9, and this is oscillated from the crank 8 by a two part connector 10. This connector" comprises a link .11 whichis pivotally connected to the crank 8 and a link 12 pivotally connected to the arm 9, as by a 1 bolt 13. As a convenient form of sliding connection between the links 11 and-12 I have shown the link 11 as provided with a slot 14:, through which the bolt '13 and a pin'15 secured in the link 12 project. The lengths are thus slidably but inflexibly connected wherefore the connector is properly supported by its connection to the operating parts without the necessity for auxiliary support.

I prefer to provide a spring 16 secured to the arm 9 and to the bracket 17, as shown in Fig. 1, to assist in moving the arm to the left so as not to depend entirely upon the friction of the parts, when the connector is moving in this direction. Pivotally connected to the link 11, as at 18, is. a releasing member '19 so arranged that this releasing member will be given relative lateral movement whenever the two parts of the connector move relatively. In the embodiment illustrated, the link, 12 and the releasing member are provided. with interengaging cam surfaces so shaped that when the feeler is intercepted-by a detector and:the links slide upon each other, the end of the releasing member will be raised, as shown in dotted lines in Fig. 4:.

A belt shifting mechanism is arranged to be setin operation by this movement of reform of rage. 5 the gurde '38, but the guide leasing member 19. In the form shown, a belt shifting rod, 20, having a belt for; 21 at one end engaging the belt 22 on the fast and loose pulleys 23 and 24, is slidably mounted in the frame of the machine. collar 25 is Seemed to the shifting rod 20 in position to be engaged by an armQG secured to a sliding rod 27. A spring 28 mounted on the rod 27 between the arm 26 and the bracket 29 secured to, the frame, urges this rod in the direction to shift the belt to the loose pulley. This rod is held againstthe action of the spring by a detent 3O slidably mounted in the bracket 17 and engaging a slot in said rod. A pin 31, secured in the detent, extends over the releasing member 19 in position to be raised thereby when the links 11 and 12 slide relatively to each other.

The detectors 4 are arranged in series, one for each sliver, and are supported be tween two guides 32 and Each detector is flat and of the form shown in Fig. 6, having a central sliver receiving opening, and provided with shoulders 3&- and 35 above, and shoulders 36 and 37 below. The guide 32 is provided with lugs 38 projecting over the top of the guide and providing stops against which the shoulders of the letector engage to limit the movement of the detector. The guides are adjustably connected together by screws 39 extending through holes 40 in the guide 32 and threaded into holes 4L1 in the guide Springs 42 are mounted on some or all of the screws to hold the guides separated, and lock-nuts 43 are provided for the ends of the screws. By this construction the guides may be adjusted to a proper distance, so that if a sliver breaks it will not wedge between the detector 4!: andthe guides to prevent the detector from falling. If the device is to be used with only one size of sliver, I prefer to use sleeves of the necessary length on the screws between the guides, instead of the springs shown. I find this flat detector to be adecided improvement over detectors previously used. which had projections which engaged the feeler in such a manner that it was necessary to move the feeler be fore it was possible to raise the detectors to insert the slivers.

In Figs. 7 and 8 I have shown another detector which is particularly adapted for use with light yarn and which prevents the breaking of the yarn by the weight of the detector. In this form the guides 1'4 and a5 are adjustably connected together by screws as in the form shown in and (3. The guide 44 is similar to v '-il-5 has no lugs projecting over the top of the guide 41 Between these guides a detector 46 yarn receiving opening t? is pivotally mounted at 48 between the guides. This having a slivers, a feeler detector is provided with a projection l9 of such a shape that it will engage the tops of the guides and prevent the detector from falling to a position where it cannot be readily raised to insert the yarn.

The operation of the device is as follows. The shaft 3 with the crank rotates constantly when the drawing rolls are in operation and through the connector 10 gives a constant oscillatory motion to the feeler 6, positioned under the detectors. Upon the breaking of a. sliver, the detector falls so as to engage the feeler 6 upon its forward movement, the feeler being stopped by said detector. The engagei rent of the cam surfaces on the link 12 and the releasing member 19 causes said releasing member to rise, as shown in dotted lines in Fig. at, engaging the pin 31, thereby raising the detent 30, releasing the rod 27 and permitting the spring 28 to shift the belt to the loose pulley. thereby stopping the machine.

Having fully described my invention, what I claim as new and desire to secure by Let ters Patent is:

1. In a machine of the class described, in combination, detector capable of assuming different positions, a feeler reciprocating adjacent said detector and arranged to be intercepted in its motion by said detector when said detector is in one position, a constantly moving member, means operated by said constantly moving member to give a. reciprocating motion to said feeler comprising a two part connector, the parts of which are slidably connected, one of said parts being provided with a cam surface, a releasing member carried by said other part and having acam surface arranged to engage the first mentioned cam surface, a shifter rod, means for holding said shifter rod in one position and arranged to be engaged by said releasing member to release said shifter rod.

2-. In a machine of the class described, in

combination, a constantly rotating member,

a reciprocating feeler, means to intercept the motion of said reciprocating feeler, a stop mechanism, means connecting sta'ntl'y rotating member and said reciproeating feeler comprising a two part connector, the parts of which are slidably connected, a releasing member pivotally connected to one of said parts, and having cam engagement with the other part, whereby said releasing member moves about its pivot when the movement of said reciprocating feeler is prevented, and a stop mechanism arranged to be set in operation by the pivotal movement of said releasing member.

3. In a machine of the class described, in

combination, detectors arranged to be held 1n normal position by slivers and to assume a second position upon the breaking of said detector, and movable past said detector said conreciprocating adjacent said when the detector is in normal position, but arranged to be intercepted and stopped by said detector when in its second position, and a constantly rotating member, means operated by said constantly rotating member to normally give reciprocatory movement to said feeler comprising a two part connector, the parts of which are sliclably connected, one of said parts being provided with a cam surface, a releasing member pivotally connected to said other part and having a cam surface arranged to engage the first mentioned cam surface, whereby said releasing member is moved upon its pivot by the interengaging cam surfaces when the said feeler is intercepted by said detector, a stop mechanism adapted to be set into operation by the pivotal movement of said releasing member when said feeler is intercepted by said detector.

&. In a device of the class described, in combination, a constantly rotating crank, an oscillating feeler, a connector between said crank and oscillating feeler, comprising a link pivotally connected to said crank, a member slidable relative to said link and provided with a cam surface, a releasing member pivotally connected to said link and having a cam surface normally engaging said first mentioned cam surface and arranged to be moved about its pivot by said interengaging cam surfaces when resistance is offered to the movement of said feeler, a stop mechanism adapted to be set into operation by the pivotal movement of the releasing member.

5. In a device of the class described, in combination, detectors normally held in elevated position, a feeler moving to and fro beneath said detectors and arranged to be intercepted in its motion whenever one of said detectors falls, means for moving said feeler to and fro comprising a link arranged to move said feeler in one direction and free to move relative to said feeler in the opposite direction a spring arranged to move said feeler in the opposite direction, a releasing member carried by said link and arranged to be operated by the relative movement of said feeler and link when the movement of the feeler is interrupted by a detector, and a stop mechanism arranged to be set in operation by said releasing member.

6. In combination, guides arranged to be adjusted toward and from each other, and provided with s aced stops, a fiat detector having a single s iver receiving opening, and shoulders projecting from its edges to engage said stops.

7 In a stop motion for roving and spinning frames, having a rocker lever, front roll with a crank, and a lock bolt; a connect ing link provided with a slot in one end portion to receive a pin in the rocker lever, the opposite end portion being connected with a crank in the front roll; a slide member, pivotally secured to the rocker lever and in movable engagement with the slot in the connecting link; a lifting member, pivoted to the said link; the slide member and the lifting member having engaging surfaces so that a movement of said members toward each other, will cause the lifting member to engage the lock bolt, and cause it to release suitable mechanism to stop the machine.

8. In a stop motion for roving and spinning frames, having a rocker lever, front roll with a crank, and a lock bolt; a connecting link provided with a slot in one end portion to receive a pin in the rocker lever, the opposite end portion being connected with a crank in the front roll; a slide member pivotally secured to the rocker lever and in movable engagement with the slot in the connecting link; a lifting member, pivoted to the said link; said slide member being provided with a cam surface to engage the lifting member, and designed so that a movement of said members toward each other, will cause the cam to raise the lifting member into engagement with the lock bolt, and cause it to release suitable mechanism to stop the machine.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

THOMAS BENTLEY.

Witnesses:

MAURICE B. LANDERS, THOMAS J. DRUMMOND.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

